2:51 pm, September 30, 2015
Bioaccumulation occurs when a substance becomes concentrated inside the body of a living thing. It happened with DDT, which concentrated in bald eagles, peregrine falcons, ospreys and others, and made their eggshells to thin so they broke easily during incubation. Those species recovered when DDT was banned in the United States on Dec. 31, 1972, though it is still used in many tropical countries.